Precious needs ca. 0,1-0,2 litres per 1000 km. I doubt that she burns it - the only spot to loose this amount would be the drive pinion´s shaft, as it is sourrounded by a brownish sauce that - I suspect - is not only chain grease but some engine oil, too. Hard to say. Does anyone changed the o-ring there? How complicated could that be?

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2010 G5A Garage without a Bullet is a empty, barren hole.

When acellerating the tears of emotion must flow off horizontally to the ears.Walter Röhrl

Precious needs ca. 0,1-0,2 litres per 1000 km. I doubt that she burns it - the only spot to loose this amount would be the drive pinion´s shaft, as it is surrounded by a brownish sauce that - I suspect - is not only chain grease but some engine oil, too. Hard to say. Does anyone changed the o-ring there? How complicated could that be?

I need to take a closer look at mine there too, I suspect the same thing. It would explain the loss with no puddle in the garage, only happens when running. I haven't changed that but I'm guessing it's not too big of a deal. Drain oil, pop the side plate, pull the chain and cog, change seal. Just need a new seal and side gasket.

To isolate the chain sludge I would thoroughly clean the chain and switch to chain wax for a while. If you still have sludge it could be the seal. Another solution is a dye that you put in the oil. It will show that engine oil is lubing your chain. It has been decades since I used it but I'm sure they still make the dye.

Haven't had any oil used up by the running of the bike in the last 1 1/2 years since new. Only spits some oil out the crankcase breather this Summer when revved hard - must have just brimmed the oil during the last change in Winter and it's expanded now. Will set it right this week - due for a change anyway moving to 300V full synth from semi synth.

The usual splattering of oil from the chain lube near the front sprocket - initially thought it was a leak from the kick-shaft seal, but no worries since using the spray lube - some gunk to clean off after the first ride after chain lube and it's OK until the next spray.

Yup, I've had it less than a year and already spoken to my mechanic about it. I'm running 10w40 right now as an experiment so I'll swtich back to a 50 weight oil first but if it's still losing oil we'll dig deeper. One of the bummers of the auto decompressor is you can't do a simple compression test. You have to do a leak down test and I don't have the equipment for that.

To isolate the chain sludge I would thoroughly clean the chain and switch to chain wax for a while. If you still have sludge it could be the seal. Another solution is a dye that you put in the oil. It will show that engine oil is lubing your chain. It has been decades since I used it but I'm sure they still make the dye.

Dye? Exellent idea, I didn´t know this trick. Thank´s a lot, I´m going to get that soon. Foolproof solution, tailor-made for me

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2010 G5A Garage without a Bullet is a empty, barren hole.

When acellerating the tears of emotion must flow off horizontally to the ears.Walter Röhrl